Renewable fuse.



E. H. WILSON & w. F. CLARK.

RENEWABLE FUSE.

APPLICATION FI'LED NOV. 3, 19141 Patented Mar. 27, 1917..`

INVENTo WITNVESSES UNITED STATES PATENT oEEIoE.

EDGAR H..WILSON, 0F CHARTIERS TOWNSHIP, ALLEGHEN Y COUNTY, AND WILLIAM F.

' CLARK, OF COBAOPOLIS, PENNSYLVANIA.

RENEWA'BLE FUSE.

Specification of Letters Patent.

Patented Mar. 27, 1917.

Application ledNovember 3, 1 914. Serial No. 870,046.

To all whom t may concern.' j Be it known that we, 1EDGAR H. WILsoN and VILLI'AM F. CLARK, both citizens of the United States,and residents, respectively, oi' Uhartiers township,

I Allegheny' county, IPennsylvania, and Coraopolis, Allegheny county, lennsylvani'm'have invented a newl newable fuse.

Fig/2 'is a similar view at "right angles thereto. v

Fig. 3 is a. perspective view df the meios- .ing case.

' Fig, tis a-perspective view of one of thefuse clamping members;

ig. 5 is asectional view of a modified form of' the device, and v Figl 6 is a similar view at right angles thereto.;`

rlhis invention relates to an improvement in renewable electrical fuses, and is designed to provide a cheap and efficient device, which can readily be made and assembled, and whichcan also 'be readily taken apart to renew the fuse after it has been blown. Another ovbject ofpur invention is tov provide a device ofthis character in which a fuse havingvagreater cross sectional area than `the predetermined fuse cannot be used.

The precise nature of our invention will be best understood'by reference to the accompanying drawings, which will now be described, it being premised'that various Vchanges may-'be made in the details of construction, and in the general arrangement of the parts without departing fromthe spirit-and scope of or invention as defined in the appended claims.

Referring to .the accompanyingdrawings -the reference character' 2 designates a nonconducting tube or casing which is provided with oppositely disposed slotsB at each end thereof.' As the connecting members on opposite ends of the device are the same, we will only describe the connections at` one end. idesignates plates or clamping memberswhich may be milled along their faces, as indicated at 5, the width of the milled recesses being equal to the width of the fuse 'l fuse for the device.

'from the cap 7 is a ribbon to be used in the particular fuse device.A rl`hese two members Llare placed` in the slots 3, the length thereof being approximately equal to the diameter of the easing 2,

and interposedv between the members el; and

seated within the recessesin said members is a fuse strip or ribbon (5. i T is a cap having an annular flange 8 which surrounds the tube 2, the length of the flange 8 beinggreat enough to extend beyond the slots 3'.' Con- 65 neeted to the 'capT isa spring clamp 9 which stradd-les' he clampingmembers' l to hold them in contact with the fusestrip 6.

lheslot between these clamping members 1s milled -to a gage, and the thickness of the 70 members #l is gaged sot'hat only a predetermined thickness of fuse ribbon can be clampedbetween the several parts. In other words, the recesses 5 provide means for preventing a ribbon having a greater width than the predetermined width frombeing used, while the clamping device 9 and the plates 4 prevent the use of a ribbon of greater thickness than the predetermined terminal member l0, which may be of any desired form for-se# curing thedevice to the terminals to be connected thereby. i

"'ln Fig. l we have shown the end cap i 85 heldin position on thetube 2 by means of a spring catch 1l, while the other vend cap 7 isheld in position by means ota vscrew l2.

The device is assembled as follows: yThe strip of fuse metal is placed betweentwo of the members 4i which are slipped yin the slots 3 in one end of the tubeor casing 2.' The.- mem-bers 4 are then slipped in the slots in the other end of the tube in opposite sides of the fuse, and the caps 7 are then slipped 95 into position over the ends of the tube, the j clamping devices 9 forcing the members 4 in contact with the fuse strip. It will readily be understood by those familiar with the art that if a fuse strip having a' greater size 100 than the predetermined stripl is used the parts cannot be assembled, so that the fuse device can be positively marked to indicate the current it will carry.

In Figs. 5 and 6 we have shown'a device 105 somewhat similar to that `shown in the figures just described, with the exception that the clamping members 9a are held in posi-I tion by means of screw caps 7" which form the terminals of the .fuse device, there being Extending upwardly 80 an electrical contact between the clamps-9a `and the caps. rlhe clamps 9a are slipped over the clamping members and the caps 7a are then screwed down 1n place and 1n con- 'tact with said clamps.

We claim:

I 1. A fuse device, comprising a fuse strip, p

clamping pieces embracing opposite sides of an end portion only of said strip,` a removable spring clamp adapted to be forced over "the clamping pieces, and means for holding the clamping pieces from moving with the clamp to prevent bnckling'of the 'fuse-strip i (lopie'sv of this patent maybe obtained for :when the clamp is being applied; substank tially as described.

.Q -A fuse device; comprising a casing, a fuse member vvithin the casing, separate clamping piecesl embracing opposite sides of any end portion ofthe strip, the casing having abutments for supporting said pieces and limiting their inward movement .in the direction of the length of the strip, and a removable clamping spring iittingover and engagingsaid pieces, the casing also having a removablev cap member which engages and normally secures the clamping spring, said pieces and clamping member being removable at the adjacent end of the casing when the capmember is removed; substantially as described. y 3. A inse device comprising a casing, a :fuse strip Within the casing, a pair of separate clamping pieces embracing opposite sides of' each end portion of the fuse strip, the casing having supports lfor the end .portions of ysaid pieces, 'a spring clamp embracing each pair of clamping pieces, and means for normally securing said clamps; each pair. of said clamping pieces and its clamp being removable from th casing at the adjacent end of the latter; substantially as described.

4;. A fuse device, comprisingI a casing havingppposite slots at an end portion there of, a fuse strip Within the casing, clamping members removably seatedin said slots and slotted portion of the casing body;

embracing an end portion of the inse stripe7 Va clamping device engaging the said mem-v bers, and meansl for normally securing the clamping device in place; substantially as described.

5. A fuse device comprising a casing having'open slots at an end portion thereof, a fuse strip Within the casing, separate clamping pieces removably 'seated in said slots and embracing an end portion oi' the fuse strip; and a U-shaped clamping spring embracing and securing` said pieces, the casing having a removable cap portion holding said spring in place; substantially as described.

6. A. fuse device, comprising a casing having opposite slotsv at an end portion thereof, a fuse strip within the casing, clamping members removably seated in said slots and embracing an end portion of the fuse strip, and a clamping device engaging the said members, the casing having a removable end closure which confines the clamping device and which also incloses the substantially as described. y

7. A fuse device comprising a casing having opposite slots in one end portionthereof,

a fuse strip, andclamping means removably seated in said slots andembracing an end portion of the strip, said slots being of predetermined Width, whereby the clamping means seated therein cannot be spread to receive a fuse strip of greater than a predetermined size; substantially as described.

8. A fuse device, comprising a fuse strip, clamping vpieces embracing opposite sides of an end portion only of said strip, a support, a. removable spring clamp adapted to be forced over the clamping pieces, and abntments on the support for holding the clamping pieces from moving with the spring clamp and therebyprevent buckling lthe fuse when the clamp is applied; substantially as described.

In testimony whereof; )ve have hereunto set our hands.

EDGAR H. WILSON. WILLIAM l". CLARK. Witnesses:

GEO. H. PARMELEE; Il. M. ComvIN.

. in l ve cents each, by addressing the Commissioner of Patents. "Washington, D. C. 

